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Arburetant integrating metal with arbon and its preparing process

A technology of carbon materials and recarburizers, applied in the field of metal and carbon material combined recarburizers and their preparation

Inactive Publication Date: 2005-03-23
上海盛宝冶金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is: improve the stability and efficiency of carburizing, increase the proportion of carburizing agent, easily dissipate and melt in molten steel, do not cause temperature loss of molten steel when adding, and can increase manganese

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0004] Embodiment 1: In terms of 100 kilograms, the proportioning of the recarburizer is: 53 kilograms of high-carbon ferromanganese powder, 45 kilograms of graphite, 1 kilogram of silica sol, Na 2 CO 3 1 kg. The particle size of the components is 0.5-6.0mm, and then the ingredients are mixed according to the ratio. The prepared materials are mixed with a mixer, and the compact is formed with a ball press machine. The finished product is baked at a temperature of 110 degrees for 7 hours. The finished product has a particle size of Φ20×50mm, the specific gravity is 3.9 g / cubic centimeter, and its composition is C42-46%, Mn32-35%. Its carburizing effect reaches 80-85%, realizing stable carburizing.

Embodiment 2

[0005] Embodiment 2: In terms of 100 kilograms, the proportioning of the recarburizer is: 38 kilograms of high-carbon ferromanganese powder, 59 kilograms of graphite, 1.5 kilograms of silica sol, Li 2 CO 3 1.5 kg. The particle size of the components is 0.5-6.0mm, and then the ingredients are mixed according to the ratio. The prepared materials are mixed with a mixer, and the compact is formed with a ball press machine. The finished product is baked at a temperature of 115 degrees for 6.5 hours. The finished product has a particle size of Φ20×50mm, the specific gravity is 3.5g / cubic centimeter, its composition is C53-55%, Mn25-28%. Its carburizing effect reaches 80-85%, realizing stable carburizing.

Embodiment 3

[0006] Embodiment 3: In terms of 100 kilograms, the proportioning of the recarburizer is: 16 kilograms of medium-carbon ferromanganese powder, 62 kilograms of graphite, 19 kilograms of iron powder, 1.5 kilograms of silica sol, Li 2 CO 3 1.5 kg. Components C55-57%, Mn10-12% are obtained. All the other are identical with embodiment 2.

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PUM

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Abstract

A carburetant for smelting steel is prepared from C (35-57 %), Mn (5-35%), silica sol (0.5-2 %) and carbonate (0.5-2 %) through proportioning, stirring, dia pressing and baking at 105-120 deg.C for 6-8 hrs.

Description

1. Technical field [0001] The invention relates to a recarburizer used in a steelmaking process, in particular to a metal and carbon material combined recarburizer and a preparation method thereof. 2. Background technology [0002] At present, various steel mills use recarburizers to increase the carbon content of molten steel to adjust the carbon content in the steel to meet the steel specification requirements. The carburizer currently used is generally pitch coke, its physical and chemical indicators are: C ≥ 98%, the particle size is 5-15mm, and the bulk specific gravity is 0.6g / cm 3 , the adding method is: when the molten steel is tapped, it is added into the molten steel tank together with the molten steel, relying on the high temperature melting of the molten steel and melting the pitch coke to realize the carburization of the molten steel. This carburizer has the following disadvantages: 1. The specific gravity is small, and its bulk specific gravity is only 0.6g / cm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/00
Inventor 刘欣隆孙树森李峰张妙法
Owner 上海盛宝冶金科技有限公司
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